The nRF52840 DK includes hardware, preprogrammed firmware, documentation, hardware schematics, and layout files.
The nRF52840 DK (PCA10056) comes with a Near Field Communication (NFC) antenna.
Figure 1. nRF52840 DK (PCA10056) and NFC antenna
Hardware files
The hardware design files including schematics, PCB layout files, bill of materials, and Gerber files for the nRF52840 DK are available on the nRF52840 product page.